diff --git a/pages/buyer/goods-detail.js b/pages/buyer/goods-detail.js
new file mode 100644
index 0000000..e69de29
diff --git a/pages/buyer/goods-detail.json b/pages/buyer/goods-detail.json
new file mode 100644
index 0000000..e69de29
diff --git a/pages/buyer/goods-detail.wxml b/pages/buyer/goods-detail.wxml
new file mode 100644
index 0000000..e69de29
diff --git a/pages/buyer/goods-detail.wxss b/pages/buyer/goods-detail.wxss
new file mode 100644
index 0000000..e69de29
diff --git a/pages/buyer/index.js b/pages/buyer/index.js
index 37d4270..044b6af 100644
--- a/pages/buyer/index.js
+++ b/pages/buyer/index.js
@@ -132,6 +132,10 @@ Page({
       return;
     }
 
+    // 点击"我想要"后，将用户类型设置为buyer
+    const API = require('../../utils/api.js');
+    API.updateUserType('buyer');
+
     // 1. 前置验证
     if (!goodsId) {
       console.error('商品ID为空，无法预约');
diff --git a/pages/buyer/index.wxml b/pages/buyer/index.wxml
index d9d22aa..74c404d 100644
--- a/pages/buyer/index.wxml
+++ b/pages/buyer/index.wxml
@@ -137,33 +137,25 @@
 </view>
 
   <!-- 未授权登录提示弹窗 -->
-  <view wx:if="{{showAuthModal}}" class="modal-overlay" style="position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: rgba(0, 0, 0, 0.5); display: flex; justify-content: center; align-items: center; z-index: 9999;">
-    <view class="modal-container" style="background: white; padding: 40rpx; border-radius: 16rpx; width: 80%; max-width: 500rpx; text-align: center;">
-      <view class="modal-title" style="font-size: 32rpx; font-weight: bold; margin-bottom: 30rpx; color: #333;">
-        <text>提示</text>
-      </view>
-      <view class="modal-content" style="font-size: 28rpx; color: #666; margin-bottom: 40rpx; line-height: 1.5;">
-        <text>请先登录后再预约商品</text>
-      </view>
-      <view class="modal-buttons">
-        <button class="primary-button" style="background-color: #1677ff; color: white; font-size: 28rpx; line-height: 80rpx; border-radius: 8rpx; margin-bottom: 20rpx;" bindtap="showOneKeyLogin">一键登录</button>
-        <button class="cancel-button" style="background-color: #f5f5f5; color: #333; font-size: 28rpx; line-height: 80rpx; border-radius: 8rpx;" bindtap="closeAuthModal">取消</button>
+  <view wx:if="{{showAuthModal}}" class="auth-modal-overlay">
+    <view class="auth-modal-container">
+      <view class="auth-modal-title">提示</view>
+      <view class="auth-modal-content">请先登录后再操作</view>
+      <view class="auth-modal-buttons">
+        <button class="auth-primary-button" bindtap="showOneKeyLogin">一键登录</button>
+        <button class="auth-cancel-button" bindtap="closeAuthModal">取消</button>
       </view>
     </view>
   </view>
 
   <!-- 一键登录弹窗 -->
-  <view wx:if="{{showOneKeyLoginModal}}" class="modal-overlay" style="position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: rgba(0, 0, 0, 0.5); display: flex; justify-content: center; align-items: center; z-index: 9999;">
-    <view class="modal-container" style="background: white; padding: 40rpx; border-radius: 16rpx; width: 80%; max-width: 500rpx; text-align: center;">
-      <view class="modal-title" style="font-size: 32rpx; font-weight: bold; margin-bottom: 30rpx; color: #333;">
-        <text>授权登录</text>
-      </view>
-      <view class="modal-content" style="font-size: 28rpx; color: #666; margin-bottom: 40rpx; line-height: 1.5;">
-        <text>请授权获取您的手机号用于登录</text>
-      </view>
-      <view class="modal-buttons">
-        <button class="primary-button" open-type="getPhoneNumber" bind:getphonenumber="onGetPhoneNumber" style="background-color: #1677ff; color: white; font-size: 28rpx; line-height: 80rpx; border-radius: 8rpx; margin-bottom: 20rpx;">授权获取手机号</button>
-        <button class="cancel-button" style="background-color: #f5f5f5; color: #333; font-size: 28rpx; line-height: 80rpx; border-radius: 8rpx;" bindtap="closeOneKeyLoginModal">取消</button>
+  <view wx:if="{{showOneKeyLoginModal}}" class="auth-modal-overlay">
+    <view class="auth-modal-container">
+      <view class="auth-modal-title">授权登录</view>
+      <view class="auth-modal-content">请授权获取您的手机号用于登录</view>
+      <view class="auth-modal-buttons">
+        <button class="auth-primary-button" open-type="getPhoneNumber" bind:getphonenumber="onGetPhoneNumber">授权获取手机号</button>
+        <button class="auth-cancel-button" bindtap="closeOneKeyLoginModal">取消</button>
       </view>
     </view>
   </view>
diff --git a/pages/buyer/index.wxss b/pages/buyer/index.wxss
index f2a7f32..a4bd8c9 100644
--- a/pages/buyer/index.wxss
+++ b/pages/buyer/index.wxss
@@ -475,4 +475,67 @@ button:after {
   height: 32vh;
   width: 100%;
   box-sizing: border-box;
+}
+
+/* 统一登录授权弹窗样式 */
+.auth-modal-overlay {
+  position: fixed;
+  top: 0;
+  left: 0;
+  right: 0;
+  bottom: 0;
+  background-color: rgba(0, 0, 0, 0.5);
+  display: flex;
+  justify-content: center;
+  align-items: center;
+  z-index: 1002;
+}
+
+.auth-modal-container {
+  background-color: #fff;
+  border-radius: 20rpx;
+  width: 80%;
+  max-width: 500rpx;
+  padding: 40rpx;
+  box-shadow: 0 8rpx 24rpx rgba(0, 0, 0, 0.15);
+}
+
+.auth-modal-title {
+  font-size: 36rpx;
+  font-weight: bold;
+  color: #333;
+  text-align: center;
+  margin-bottom: 30rpx;
+}
+
+.auth-modal-content {
+  font-size: 32rpx;
+  line-height: 1.5;
+  color: #666;
+  text-align: center;
+  margin-bottom: 40rpx;
+}
+
+.auth-modal-buttons {
+  display: flex;
+  flex-direction: column;
+  gap: 20rpx;
+}
+
+.auth-primary-button {
+  background-color: #1677ff;
+  color: #fff;
+  font-size: 32rpx;
+  line-height: 1.5;
+  border-radius: 8rpx;
+  padding: 20rpx 0;
+}
+
+.auth-cancel-button {
+  background-color: #f5f5f5;
+  color: #666;
+  font-size: 32rpx;
+  line-height: 1.5;
+  border-radius: 8rpx;
+  padding: 20rpx 0;
 }
\ No newline at end of file
diff --git a/pages/index/index.wxml b/pages/index/index.wxml
index 7466c01..a07ec97 100644
--- a/pages/index/index.wxml
+++ b/pages/index/index.wxml
@@ -19,37 +19,25 @@
   </view>
   
   <!-- 未授权登录提示弹窗 -->
-  <view wx:if="{{showAuthModal}}" class="modal-overlay">
-    <view class="modal-container">
-      <view class="modal-title">
-        <text>提示</text>
-      </view>
-      <view class="modal-content">
-        <text>您还没有授权登录</text>
-      </view>
-      <view class="modal-buttons">
-        <button class="primary-button" bindtap="showOneKeyLogin">
-          一键登录
-        </button>
-        <button class="cancel-button" bindtap="closeAuthModal">取消</button>
+  <view wx:if="{{showAuthModal}}" class="auth-modal-overlay">
+    <view class="auth-modal-container">
+      <view class="auth-modal-title">提示</view>
+      <view class="auth-modal-content">请先登录后再操作</view>
+      <view class="auth-modal-buttons">
+        <button class="auth-primary-button" bindtap="showOneKeyLogin">一键登录</button>
+        <button class="auth-cancel-button" bindtap="closeAuthModal">取消</button>
       </view>
     </view>
   </view>
   
   <!-- 一键登录弹窗 -->
-  <view wx:if="{{showOneKeyLoginModal}}" class="modal-overlay">
-    <view class="modal-container">
-      <view class="modal-title">
-        <text>授权登录</text>
-      </view>
-      <view class="modal-content">
-        <text>请授权获取您的手机号用于登录</text>
-      </view>
-      <view class="modal-buttons">
-        <button class="primary-button" open-type="getPhoneNumber" bind:getphonenumber="onGetPhoneNumber">
-          授权获取手机号
-        </button>
-        <button class="cancel-button" bindtap="closeOneKeyLoginModal">取消</button>
+  <view wx:if="{{showOneKeyLoginModal}}" class="auth-modal-overlay">
+    <view class="auth-modal-container">
+      <view class="auth-modal-title">授权登录</view>
+      <view class="auth-modal-content">请授权获取您的手机号用于登录</view>
+      <view class="auth-modal-buttons">
+        <button class="auth-primary-button" open-type="getPhoneNumber" bind:getphonenumber="onGetPhoneNumber">授权获取手机号</button>
+        <button class="auth-cancel-button" bindtap="closeOneKeyLoginModal">取消</button>
       </view>
     </view>
   </view>
diff --git a/pages/index/index.wxss b/pages/index/index.wxss
index e792b37..8568058 100644
--- a/pages/index/index.wxss
+++ b/pages/index/index.wxss
@@ -109,7 +109,7 @@ page {
 }
 
 /* 弹窗样式 */
-.modal-overlay {
+.auth-modal-overlay {
   position: fixed;
   top: 0;
   left: 0;
@@ -119,38 +119,56 @@ page {
   display: flex;
   justify-content: center;
   align-items: center;
-  z-index: 999;
+  z-index: 1002;
 }
 
-.modal-container {
-  background-color: white;
-  border-radius: 16rpx;
+.auth-modal-container {
+  background-color: #fff;
+  border-radius: 20rpx;
   width: 80%;
+  max-width: 500rpx;
   padding: 40rpx;
+  box-shadow: 0 8rpx 24rpx rgba(0, 0, 0, 0.15);
 }
 
-.modal-title {
-  text-align: center;
-  margin-bottom: 30rpx;
-}
-
-.modal-title text {
+.auth-modal-title {
   font-size: 36rpx;
   font-weight: bold;
+  color: #333;
+  text-align: center;
+  margin-bottom: 30rpx;
 }
 
-.modal-content {
+.auth-modal-content {
+  font-size: 32rpx;
+  line-height: 1.5;
+  color: #666;
   text-align: center;
   margin-bottom: 40rpx;
-  color: #666;
 }
 
-.modal-content text {
+.auth-modal-buttons {
+  display: flex;
+  flex-direction: column;
+  gap: 20rpx;
+}
+
+.auth-primary-button {
+  background-color: #1677ff;
+  color: #fff;
   font-size: 32rpx;
+  line-height: 1.5;
+  border-radius: 8rpx;
+  padding: 20rpx 0;
 }
 
-.modal-buttons {
-  text-align: center;
+.auth-cancel-button {
+  background-color: #f5f5f5;
+  color: #666;
+  font-size: 32rpx;
+  line-height: 1.5;
+  border-radius: 8rpx;
+  padding: 20rpx 0;
 }
 
 .primary-button {
diff --git a/pages/seller/index.js b/pages/seller/index.js
index 32272fb..f581ad8 100644
--- a/pages/seller/index.js
+++ b/pages/seller/index.js
@@ -1165,6 +1165,10 @@ Page({
     try {
       const res = await API.uploadUserInfo(uploadData)
       console.log('用户信息上传成功:', res)
+      
+      // 入驻成功后，将用户类型设置为seller
+      API.updateUserType('seller');
+      
       return res
     } catch (err) {
       console.error('用户信息上传失败:', err)
@@ -1207,10 +1211,12 @@ Page({
         wx.switchTab({ url: '/pages/buyer/index' })
       } else {
         // 卖家登录成功后，重新显示创建货源弹窗
+        // 从本地存储加载保存的表单数据
+        const savedSupply = wx.getStorageSync('newSupplyDraft') || { name: '', price: '', minOrder: '', yolk: '', spec: '', imageUrls: [] };
         this.setData({
           showImagePreview: false,
           showModal: true,
-          newSupply: { name: '', price: '', minOrder: '', yolk: '', spec: '', imageUrls: [] }
+          newSupply: savedSupply
         });
         this.disablePageScroll();
       }
@@ -1397,6 +1403,8 @@ Page({
     
     if (!userId || !openid || !userInfo) {
       console.log('用户未登录，显示登录提示');
+      // 登录前保存当前表单数据到本地存储
+      wx.setStorageSync('newSupplyDraft', this.data.newSupply);
       // 用户未登录，显示未授权提示弹窗
       wx.showModal({
         title: '登录提示',
@@ -2895,6 +2903,29 @@ Page({
     });
   },
   
+  // 双击检测变量
+  lastTapTime: {},
+  tapCount: {},
+  
+  // 通用双击检测函数
+  handleDoubleTap: function(e, type, callback) {
+    const currentTime = Date.now();
+    const tapKey = `${type}-${e.currentTarget.dataset.index}`;
+    const lastTap = this.lastTapTime[tapKey] || 0;
+    const tapInterval = currentTime - lastTap;
+    
+    if (tapInterval < 300 && tapInterval > 0) {
+      // 双击事件触发，执行确认选择
+      callback();
+    } else {
+      // 单击事件触发，执行选择操作
+      this.lastTapTime[tapKey] = currentTime;
+      setTimeout(() => {
+        delete this.lastTapTime[tapKey];
+      }, 300);
+    }
+  },
+  
   // 弹窗中选择规格
   onModalSpecSelect: function (e) {
     const index = e.currentTarget.dataset.index;
@@ -2903,6 +2934,11 @@ Page({
       selectedModalSpecIndex: index,
       modalSpecSearchKeyword: selectedSpec // 自动填充搜索框为当前选择的规格
     });
+    
+    // 检测双击
+    this.handleDoubleTap(e, 'spec', () => {
+      this.confirmSpecSelection();
+    });
   },
   
   // 确认规格选择
@@ -3393,6 +3429,11 @@ Page({
     this.setData({
       selectedNameIndex: index
     });
+    
+    // 检测双击
+    this.handleDoubleTap(e, 'name', () => {
+      this.confirmNameSelection();
+    });
   },
   
   confirmNameSelection() {
@@ -3469,6 +3510,11 @@ Page({
     this.setData({
       selectedYolkIndex: index
     });
+    
+    // 检测双击
+    this.handleDoubleTap(e, 'yolk', () => {
+      this.confirmYolkSelection();
+    });
   },
   
   confirmYolkSelection() {
diff --git a/pages/seller/index.wxml b/pages/seller/index.wxml
index d7fa512..d81f1dc 100644
--- a/pages/seller/index.wxml
+++ b/pages/seller/index.wxml
@@ -803,16 +803,10 @@
   <!-- 未授权登录提示弹窗 -->
   <view wx:if="{{showAuthModal}}" class="auth-modal-overlay">
     <view class="auth-modal-container">
-      <view class="auth-modal-title">
-        <text>提示</text>
-      </view>
-      <view class="auth-modal-content">
-        <text>您还没有授权登录</text>
-      </view>
+      <view class="auth-modal-title">提示</view>
+      <view class="auth-modal-content">请先登录后再操作</view>
       <view class="auth-modal-buttons">
-        <button class="auth-primary-button" bindtap="showOneKeyLogin">
-          一键登录
-        </button>
+        <button class="auth-primary-button" bindtap="showOneKeyLogin">一键登录</button>
         <button class="auth-cancel-button" bindtap="closeAuthModal">取消</button>
       </view>
     </view>
diff --git a/pages/seller/index.wxss b/pages/seller/index.wxss
index ddf5b6f..5daf727 100644
--- a/pages/seller/index.wxss
+++ b/pages/seller/index.wxss
@@ -529,38 +529,35 @@ button {
   left: 0;
   right: 0;
   bottom: 0;
-  background-color: rgba(0, 0, 0, 0.5);
+  background: rgba(0, 0, 0, 0.5);
   display: flex;
   justify-content: center;
   align-items: center;
-  z-index: 999;
+  z-index: 9999;
 }
 
 .auth-modal-container {
-  background-color: white;
+  background: white;
+  padding: 40rpx;
   border-radius: 16rpx;
   width: 80%;
-  padding: 40rpx;
-}
-
-.auth-modal-title {
+  max-width: 500rpx;
   text-align: center;
-  margin-bottom: 30rpx;
+  box-shadow: 0 8rpx 24rpx rgba(0, 0, 0, 0.1);
 }
 
-.auth-modal-title text {
-  font-size: 36rpx;
+.auth-modal-title {
+  font-size: 32rpx;
   font-weight: bold;
+  margin-bottom: 30rpx;
+  color: #333;
 }
 
 .auth-modal-content {
-  text-align: center;
-  margin-bottom: 40rpx;
+  font-size: 28rpx;
   color: #666;
-}
-
-.auth-modal-content text {
-  font-size: 32rpx;
+  margin-bottom: 40rpx;
+  line-height: 1.5;
 }
 
 .auth-modal-buttons {
@@ -570,22 +567,18 @@ button {
 .auth-primary-button {
   background-color: #1677ff;
   color: white;
-  width: 100%;
+  font-size: 28rpx;
+  line-height: 80rpx;
   border-radius: 8rpx;
   margin-bottom: 20rpx;
-  border: none;
-  font-size: 32rpx;
-  font-weight: 600;
-  text-shadow: 0 2rpx 4rpx rgba(0, 0, 0, 0.2);
 }
 
 .auth-cancel-button {
-  background: none;
-  color: #666;
-  border: none;
-  font-size: 32rpx;
-  font-weight: 600;
-  text-shadow: 0 2rpx 4rpx rgba(0, 0, 0, 0.1);
+  background-color: #f5f5f5;
+  color: #333;
+  font-size: 28rpx;
+  line-height: 80rpx;
+  border-radius: 8rpx;
 }
 
 /* 头像选择样式 */
diff --git a/pages/settlement/index.js b/pages/settlement/index.js
index 9bc1034..9d339db 100644
--- a/pages/settlement/index.js
+++ b/pages/settlement/index.js
@@ -37,6 +37,7 @@ Page({
     
     // 登录弹窗相关
     showAuthModal: false,
+    showOneKeyLoginModal: false,
     loginModalTitle: '请先登录',
     loginModalContent: '为了您的账户安全，请先完成手机号登录',
     showLoginButton: true
@@ -825,6 +826,19 @@ Page({
     });
   },
 
+  // 显示一键登录弹窗
+  showOneKeyLogin() {
+    this.setData({
+      showAuthModal: false,
+      showOneKeyLoginModal: true
+    })
+  },
+
+  // 关闭一键登录弹窗
+  closeOneKeyLoginModal() {
+    this.setData({ showOneKeyLoginModal: false })
+  },
+
   // 处理手机号授权
   async onGetPhoneNumber(e) {
     console.log('用户点击了手机号授权按钮', e.detail);
diff --git a/pages/settlement/index.wxml b/pages/settlement/index.wxml
index 46fc908..63e07e5 100644
--- a/pages/settlement/index.wxml
+++ b/pages/settlement/index.wxml
@@ -341,27 +341,26 @@
 
 
 
-<!-- 登录授权弹窗 -->
-<view class="auth-modal" wx:if="{{showAuthModal}}">
-  <view class="auth-content">
-    <view class="auth-header">
-      <view class="auth-title">登录授权</view>
-      <view class="auth-close" bindtap="closeAuthModal">×</view>
+<!-- 未授权登录提示弹窗 -->
+<view wx:if="{{showAuthModal}}" class="auth-modal-overlay">
+  <view class="auth-modal-container">
+    <view class="auth-modal-title">提示</view>
+    <view class="auth-modal-content">请先登录后再操作</view>
+    <view class="auth-modal-buttons">
+      <button class="auth-primary-button" bindtap="showOneKeyLogin">一键登录</button>
+      <button class="auth-cancel-button" bindtap="closeAuthModal">取消</button>
     </view>
-    <view class="auth-body">
-      <view class="auth-icon">📱</view>
-      <view class="auth-text">为了提供更好的服务，需要获取您的手机号进行身份验证</view>
-      
-      <!-- 手机号授权按钮 -->
-      <button 
-        class="auth-btn" 
-        open-type="getPhoneNumber"
-        bindgetphonenumber="onGetPhoneNumber"
-      >
-        授权手机号
-      </button>
-      
-      <view class="auth-tip">授权后即可完成入驻申请</view>
+  </view>
+</view>
+
+<!-- 一键登录弹窗 -->
+<view wx:if="{{showOneKeyLoginModal}}" class="auth-modal-overlay">
+  <view class="auth-modal-container">
+    <view class="auth-modal-title">授权登录</view>
+    <view class="auth-modal-content">请授权获取您的手机号用于登录</view>
+    <view class="auth-modal-buttons">
+      <button class="auth-primary-button" open-type="getPhoneNumber" bind:getphonenumber="onGetPhoneNumber">授权获取手机号</button>
+      <button class="auth-cancel-button" bindtap="closeOneKeyLoginModal">取消</button>
     </view>
   </view>
 </view>
\ No newline at end of file
diff --git a/pages/settlement/index.wxss b/pages/settlement/index.wxss
index 2eae155..5a46991 100644
--- a/pages/settlement/index.wxss
+++ b/pages/settlement/index.wxss
@@ -1552,28 +1552,63 @@ picker {
 }
 
 /* 登录授权弹窗 */
-.auth-modal {
+/* 统一的授权登录弹窗样式 */
+.auth-modal-overlay {
   position: fixed;
   top: 0;
   left: 0;
-  width: 100%;
-  height: 100%;
-  background-color: rgba(0, 0, 0, 0.5);
-  z-index: 1002;
+  right: 0;
+  bottom: 0;
+  background: rgba(0, 0, 0, 0.5);
   display: flex;
   justify-content: center;
   align-items: center;
+  z-index: 9999;
 }
 
-.auth-content {
-  background-color: white;
-  border-radius: 20rpx;
-  width: 85%;
-  max-width: 520rpx;
-  overflow: hidden;
-  display: flex;
-  flex-direction: column;
-  animation: modalSlideIn 0.3s ease-out;
+.auth-modal-container {
+  background: white;
+  padding: 40rpx;
+  border-radius: 16rpx;
+  width: 80%;
+  max-width: 500rpx;
+  text-align: center;
+  box-shadow: 0 8rpx 24rpx rgba(0, 0, 0, 0.1);
+}
+
+.auth-modal-title {
+  font-size: 32rpx;
+  font-weight: bold;
+  margin-bottom: 30rpx;
+  color: #333;
+}
+
+.auth-modal-content {
+  font-size: 28rpx;
+  color: #666;
+  margin-bottom: 40rpx;
+  line-height: 1.5;
+}
+
+.auth-modal-buttons {
+  text-align: center;
+}
+
+.auth-primary-button {
+  background-color: #1677ff;
+  color: white;
+  font-size: 28rpx;
+  line-height: 80rpx;
+  border-radius: 8rpx;
+  margin-bottom: 20rpx;
+}
+
+.auth-cancel-button {
+  background-color: #f5f5f5;
+  color: #333;
+  font-size: 28rpx;
+  line-height: 80rpx;
+  border-radius: 8rpx;
 }
 
 @keyframes modalSlideIn {
diff --git a/utils/api.js b/utils/api.js
index b75649c..ccbaa8f 100644
--- a/utils/api.js
+++ b/utils/api.js
@@ -1570,6 +1570,82 @@ module.exports = {
     return request('/api/user/upload', 'POST', data);
   },
 
+  // 更新用户类型
+  updateUserType: async (typeToAdd) => {
+    try {
+      const userId = wx.getStorageSync('userId');
+      const openid = wx.getStorageSync('openid');
+      const userInfo = wx.getStorageSync('userInfo');
+      
+      if (!userId || !openid) {
+        console.log('用户未登录，无法更新用户类型');
+        return;
+      }
+      
+      // 获取当前用户类型
+      let users = wx.getStorageSync('users') || {};
+      let currentType = users[userId] && users[userId].type ? users[userId].type : '';
+      
+      // 计算新的用户类型
+      let newType = currentType;
+      
+      // 如果要添加的类型与当前类型相同，则不改变
+      if (newType === typeToAdd) {
+        return;
+      }
+      
+      // 如果当前类型为空，则直接设置为要添加的类型
+      if (!newType) {
+        newType = typeToAdd;
+      } else {
+        // 如果当前类型是buyer，要添加seller，则变为both
+        if (newType === 'buyer' && typeToAdd === 'seller') {
+          newType = 'both';
+        }
+        // 如果当前类型是seller，要添加buyer，则变为both
+        else if (newType === 'seller' && typeToAdd === 'buyer') {
+          newType = 'both';
+        }
+      }
+      
+      // 如果类型没有变化，不需要更新
+      if (newType === currentType) {
+        return;
+      }
+      
+      // 更新本地存储
+      if (!users[userId]) {
+        users[userId] = {};
+      }
+      users[userId].type = newType;
+      wx.setStorageSync('users', users);
+      
+      // 更新全局数据
+      const app = getApp();
+      app.globalData.userType = newType;
+      
+      // 上传到服务器
+      const uploadData = {
+        userId,
+        openid,
+        ...userInfo,
+        type: newType,
+        timestamp: Date.now()
+      };
+      
+      // 调用用户信息更新API
+      return API.request({
+        url: '/api/user/update',
+        method: 'POST',
+        data: uploadData
+      });
+      
+    } catch (error) {
+      console.error('更新用户类型失败:', error);
+      throw error;
+    }
+  },
+
   // 获取用户信息用于调试
   getUserInfoForDebug: function () {
     const openid = wx.getStorageSync('openid');